<template>
    <view>
        <view class="search-box">
            <!-- 使用 uni-ui 提供的搜索组件 -->
            <uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
        </view>
        <view v-if=" kw == 0">
            <view class="history-box">
              <!-- 标题区域 -->
              <view class="history-title">
                <text>搜索历史</text>
                <uni-icons type="trash" size="17" @click="deleteHistory"></uni-icons>
              </view>
              <!-- 列表区域 -->
              <view class="history-list">
                <uni-tag :text="item" v-for="(item, i) in historyList" :key="i" @click="gotoGoodsList(item)"></uni-tag>
              </view>
            </view>
        </view>
        <!-- 搜索列表结果-->
        <view class="sugg-list" v-else>
            <view class="sugg-item" v-for="(item, index) in searchResults.goods" :key="index" @click="gotoDetail(item.goods_id)">
                <view class="goods-name">{{ item.goods_name }}</view>
                <uni-icons type="arrowright" size="16"></uni-icons>
            </view>
        </view>
    </view>
</template>

<script>
export default {
    data() {
        return {
            //延时器的timerId
            timer: null,
            //搜索关键词
            kw: '',
            //搜索结果列表
            searchResults: [],
            //搜索关键词的历史记录
            historyList:[]
        };
    },
    onLoad(){
        this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
    },
    methods: {
        input(e) {
            clearTimeout(this.timer);
            this.timer = setTimeout(() => {
                this.kw = e;
                this.getSearchList();
            }, 500);
        },
        async getSearchList() {
            if (this.kw === '') {
                this.searchResults = [];
                return;
            }
            const { data: res } = await uni.$http.get('/goods/search', { query: this.kw }); 
            if (res.meta.status !== 200) return uni.$showMsg();
            this.searchResults = res.message;
            this.saveSearchHistory()
        },
        gotoDetail(id) {
            uni.navigateTo({
                url:'/subpkg/goods_detail/goods_detail?goods_id='+id
            })
        },
        saveSearchHistory(){
            const set = new Set(this.historyList)
            set.delete(this.kw)
            set.add(this.kw)
            this.historyList = Array.from(set)
            uni.setStorageSync("kw",JSON.stringify(this.historyList))
        },
        deleteHistory(){
            this.historyList = []
            uni.setStorageSync('kw','[]')
        },
        gotoGoodsList(kw){
            uni.navigateTo({
                url:'/subpkg/goods_list/goods_list?query='+kw
            })
        }
    }
};
</script>

<style lang="scss">
.uni-searchbar {
    display: flex;
    flex-direction: row;
    position: relative;
    padding: 16rpx;
    background-color: #c00000;
}
.search-box {
    position: sticky;
    top: 0;
    z-index: 999;
}
.sugg-list{
    padding: 0 5px;
    .sugg-item{
         font-size:12px;
         padding:13px 0;
         border-bottom: 1px solid #efefef;
         display: flex;
         justify-content: space-between;
         .goods-name{
             white-space: nowrap;
             overflow:hidden;
             text-overflow: ellipsis;
             margin-right: 3px;
         }
    }
}
.history-box {
  padding: 0 5px;

  .history-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }

  .history-list {
    display: flex;
    flex-wrap: wrap;

    .uni-tag {
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}
</style>
